High-rate dissolved air flotation with chemical coagulation in ISO shipping containers. For medium-TSS wastewater with FOG, suspended solids, and pre-treatment for sewer discharge.
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High-rate DAF units (5–40 m²) with lamella plates, automatic skimming, and pressurised air saturation.
pH correction, coagulant (alum/PAC), anionic polymer, antifoam, and emulsion breaker dosing systems.
Thickening hoppers, progressive cavity pumps, and optional dewatering container for dry cake production.
Sand, dual-media, or disc filtration after DAF for TSS polishing before discharge or reuse.
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PLC-based control with 10" HMI touchscreen. Remote monitoring via 4G/WiFi. Data logging, alarm management, and auto-dosing control.
Coagulant and flocculant preparation tanks with peristaltic metering pumps. Automated pH correction with inline probes.
SS316 centrifugal pump with VFD and electromagnetic flowmeter. Delivers raw wastewater at controlled flow rates to the DAF unit.
Oil-free scroll compressor provides 6-8 bar air to the saturation vessel. Low noise, auto-purge cycle, vibration isolated.
ASME VIII pressure vessel dissolves compressed air into recycled water at 6 bar. Releases micro-bubbles (30-50 um) on depressurisation.
Multistage centrifugal pump delivers 10-30% of feed flow to the saturation vessel at 6 bar operating pressure.
Primary separation chamber with white water distribution manifold, chain-and-flight sludge scraper, and adjustable effluent weir.
Flash mix and flocculation chamber with variable-speed mixers. Retention time 10-20 min for optimal floc formation before DAF.
60-degree conical hopper concentrates floated sludge. Mechanical scraper directs sludge to central discharge point.
Buffer tank for clarified water. Level-controlled with ultrasonic sensor. Overflow protection and sampling point for compliance monitoring.
Progressive cavity pump for thickened sludge discharge. VFD controlled, handles up to 8% dry solids without clogging.
Anthracite + sand + garnet media filter for effluent polishing. Auto-backwash with PLC timer or differential pressure trigger.
Medium-pressure UV reactor for bacterial disinfection. UVT sensor monitors transmittance. Automatic quartz sleeve wiping system.
Stores treated water for filter backwash cycles. Volume sized for 2-3 complete backwash sequences.
Acid/alkali dosing with inline pH probe and mixer. Maintains effluent pH 6.5-8.5 for discharge compliance.
Collection tank for thickened sludge with slow-speed mixer to prevent consolidation. Tanker connection point for off-site disposal.
Centrifugal pump for final effluent delivery. Pressure-rated for discharge to sewer or reuse line.
VFD drives for all pumps and mixers. Circuit breakers, contactors, and overload protection. IP65 rated with ventilation.
Enclosed sampling points for inlet, process, and effluent streams. Flow-through cell for online analysers.
Electromagnetic flowmeter with 4-20 mA output to PLC. Records cumulative flow for regulatory reporting.
| Parameter | 10–25 m³/h (1×40ft HC) | 25–50 m³/h (2×40ft HC) | 50–100 m³/h (3×40ft HC) | 100–200 m³/h (5–6×40ft HC) |
|---|---|---|---|---|
| Screening | 3 mm automatic screen | 3 mm auto + 1 mm protection | 6 mm + 3 mm two-stage | 6 mm + 3 mm + 1 mm three-stage |
| Equalization | 10 m³ with mixer | 20 m³ with aerated mixing | 30 m³ with pH adjustment | Dual 30 m³ with level control |
| DAF Unit | 5 m², 3 m × 1.7m footprint | 10 m², 4m × 2.5m | 20 m², 5m × 4m | 2× 20 m², 10m × 4m total |
| DAF Loading Rate | 5–10 m³/h/m² | 5–10 m³/h/m² | 5–10 m³/h/m² | 5–10 m³/h/m² |
| Saturation Pressure | 500–600 kPa | 500–600 kPa | 500–600 kPa | 500–600 kPa with standby |
| Oil Removal | Integrated skimmer + CPI pre-stage | DAF + CPI pre-treatment | DAF + CPI + hydrocyclone (>50 mg/L) | Dual DAF + CPI + API |
| TSS Removal | 85–95% TSS, inlet 100–500 mg/L | 85–95% TSS | 90–97% TSS | 90–97% TSS |
| Coagulant Dosing | Alum or PAC, 5–50 mg/L, flow-paced | Alum/PAC + polymer, automated | Alum/PAC + polymer + antifoam | Full suite + lime (P-removal) |
| Post-Filtration | Sand filter, 0.6m dia | Dual-media, 0.8m dia | Dual-media + disc filter option | Multimedia + disc filter |
| Sludge Production | 0.5–2% of flow volume | 1–3% of flow volume | 2–4% of flow volume | 3–5% of flow volume |
| Sludge Handling | Thickening hopper + drum | Thickening + PC pump to drum | Thickening + dewatering container | Dedicated sludge container |
| Power | 15 kW, 400V 3-phase | 28 kW, 400V 3-phase | 48 kW, 400V 3-phase + VFD | 85 kW, 400V 3-phase + VFD |
| Effluent | TSS <30 mg/L, oil <5 mg/L | TSS <20 mg/L, oil <3 mg/L | TSS <10 mg/L, oil <1 mg/L | TSS <5 mg/L, oil <1 mg/L |
| SCADA | Tier 2: Standard automation | Tier 2–3: Advanced | Tier 3: Advanced SCADA | Tier 4: Enterprise DCS |
Vegetable washing, dairy washwaters, beverage production with medium TSS and FOG.
Kitchen waste, grease trap effluent, rendering wastewater with high emulsified oil content.
Metalworking fluids, parts washing, floor washdown with suspended solids and tramp oil.
Grape processing, fermentation wastewater with high organic loading and suspended solids.
Vegetable processing, food preparation washwaters with seasonal variable flows.
Industrial pre-treatment meeting local authority discharge consent for trade effluent.
For low-TSS applications. CPI/API oil removal with sand filtration and UV.
For emulsified oils and heavy metals where DAF chemicals are insufficient.
For high-BOD wastewater requiring advanced biological treatment after DAF pre-treatment.
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